EP1996983B1 - Method and control and data transmission system for verifying the installation location of a secure communications component - Google Patents
Method and control and data transmission system for verifying the installation location of a secure communications component Download PDFInfo
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- EP1996983B1 EP1996983B1 EP07723245A EP07723245A EP1996983B1 EP 1996983 B1 EP1996983 B1 EP 1996983B1 EP 07723245 A EP07723245 A EP 07723245A EP 07723245 A EP07723245 A EP 07723245A EP 1996983 B1 EP1996983 B1 EP 1996983B1
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- European Patent Office
- Prior art keywords
- secure
- subscriber
- control device
- location identifier
- communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/423—Loop networks with centralised control, e.g. polling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25111—Using broadcast message
Definitions
- the invention relates to a method for checking the installation location of at least one secure communication device connected to a control and data transmission system and a control and data transmission system which is particularly suitable for carrying out this method.
- Control and data transmission systems today occupy an outstanding position in industrial production and plant control due to the high degree of automation that is possible with it.
- Very widespread is the use of a communication system, via which a plurality of decentralized input and output units are connected to a central control device.
- automation systems In order to comply with safety standards when carrying out safety-critical processes, automation systems primarily use communication systems that include, for example, a CAN bus, Profibus or INTERBUS in conjunction with safety-related bus components.
- safety-related processes protective gratings and protective doors are monitored, for example, and two-hand switches and emergency stop switches are activated.
- the bus components connected to such a communication system are also referred to below as Subscriber or bus user called.
- Safety-related bus components are also referred to as safe bus subscribers, which can be connected to non-secure bus subscribers in such a communication system.
- EP 1 206 868 B1 Furthermore, a method for configuring a secure bus subscriber and a control system is known which has such a bus subscriber.
- a management unit for the allocation of subscriber addresses is provided, which is connected to the bus.
- a special maintenance mode is provided, in which maintenance telegrams are sent via the bus.
- a log-on telegram is sent to the management unit by a secure bus subscriber, which comprises a defined universal address. If the administrative unit in turn receives such a log-on message with a contained universal address, it sends back an address-switching telegram with a defined subscriber address to the secure bus subscriber, where it is stored.
- a method for address assignment for secure bus users is known, which are preferably connected to an annular field bus according to the Interbus standard.
- the secure bus subscribers have a secure communication layer, also known as the Safety Communication Layer Slave (SCLS), in order to be able to generate and exchange more secure messages.
- SCLS Safety Communication Layer Slave
- An Interbus master is also connected to the fieldbus, to which a safe control unit with a secure communication layer is assigned, which is also called Safety Communication Layer Master (SCLM).
- SCLM Safety Communication Layer Master
- the SCLS is assigned a connection ID for each secure bus participant. The connection ID ensures that the SCLM can always communicate with a desired SCLS.
- the present invention is therefore an object of the invention to provide a method and a control and data transmission system with which a reliable verification of the installation of a secure participant is possible at any time.
- An essential idea of the invention is to transmit a location identifier to a secure subscriber in two independent communication cycles and then establish a relationship between the location identifier assigned to the secure subscriber and its location so that it can be reliably checked whether the secure subscriber is at the Installation site is turned on, a user has actually provided for it.
- a method for checking the installation location of at least one secure subscriber connected to a control and data transmission system wherein a non-secure communication control device is connected to the control and data transmission system, to which a secure control device is assigned.
- the non-secure communication control device knows the position of each connected subscriber in the control and data transmission system.
- a first configuration data record is stored, the information about the position of all connected participants with respect to the control and data transmission system and an individual location identifier for each secure subscriber contains.
- the configuration data set can be created by a user who wants to configure the control and data transmission system according to its settings.
- the first configuration data set preferably reflects the projected structure of the control and data transmission system.
- a second configuration record is stored in the secure controller.
- the second configuration data record contains a list of only the switched-on secure subscribers and an individual location identifier for each secure subscriber.
- an individual location identifier is transmitted from the non-secure communication control device to each secure subscriber which is connected to the control and data transmission system.
- the individual location identifiers contained in the second configuration record are transmitted in secure messages from the secure controller to the non-secure communication controller.
- the individual location identifiers contained in the received secure messages are transmitted from the non-secure communication controller to the respective secure subscribers.
- Each secure subscriber compares the received in the first and second communication cycle individual location identifiers. If a secure subscriber determines a match between the individual location identifiers, it is checked whether a reference location identifier has already been stored in the respective secure subscriber.
- the individual location identifier which has been received in the first or in the second communication cycle is compared with the Re.ferenz location identifier. If the individual location identifier matches the stored reference location code of the respective secure subscriber, the secure controller is signaled that the respective secure bus subscriber is switched on at the predetermined installation location.
- the method for checking the installation location of a secure bus subscriber is also suitable for being able to reliably check during the first startup of the control and data transmission system whether all the secure subscribers are also connected to the installation locations specified by the user during the configuration phase.
- the individual transmitted in the first or second communication cycle Location identifier stored as a reference location identifier in the respective secure subscriber, if so far no reference location identifier or alternatively a predetermined standard reference location identifier has been stored.
- the secure control device receives from the respective secure subscriber a secure message containing information that the transmitted in the first and second communication cycle location identifiers match and that no reference location identifier is stored in each secure subscriber.
- the secure controller informs an operator that the location identifiers transmitted in the first and second communication cycles match and that no reference location identifier has yet been stored in the respective secure subscriber.
- the secure controller then requests the operator to confirm that the respective secure subscriber is turned on at the predetermined location.
- the reference location identifier stored in the respective secure subscriber is compared with the individual location identifier. If the reference location identifier does not match the individual location identifier, the reference location identifier is overwritten by the respective individual location identifier.
- the respective secure subscriber then sends a secure message to the secure controller containing information that the individual location identifiers received in the first and second communication cycles do not match the stored reference location identifier.
- the secure controller may appropriately inform and prompt the operator to confirm the location of installation of the particular secure bus subscriber.
- connection IDs can be used according to the method described in US Pat DE 10 2005 019970 A1 described method between the secure participants and the secure control device are agreed.
- the present method for checking the installation location it is possible to detect errors in the configuration of the control and data transmission system, the structure and addressing of the control and data transmission system as well as other user errors. This can avoid that the control and data transmission system damaged and / or operators are injured.
- the respective secure subscribers and / or the control and data transmission system are transferred to a safe state if the operator does not confirm that the respective secure subscriber is turned on at the predetermined location, or if the respective secure subscriber does not match the first and second Communication cycle transmitted individual location identifiers.
- the reference location identifier is replaced in the respective secure subscriber only by the individual location identifier when the operator has previously confirmed that the respective secure subscriber is turned on at the predetermined location.
- the method can be used particularly advantageously if the control and data transmission system is annular and designed as a fieldbus according to the Interbus standard.
- the subscribers connected to the fieldbus which are also called bus subscribers, no subscriber addresses must be assigned.
- the Interbus works in the manner of a shift register, in which the bus participants are annularly connected to each other and form the individual memory locations of the shift register. Due to this particular Interbus configuration, the non-secure communication controller may become aware of the position of all bus subscribers during an identification cycle and / or data cycle, both in terms of ID shift shift registers and position in the data cycle shift register.
- the first communication cycle corresponds to the ID cycle and the second communication cycle corresponds to the data cycle of the Interbus protocol.
- the individual location identifiers destined for the secure bus subscribers connected to the fieldbus are transmitted at the corresponding locations within a sum frame from the non-secure communication control device to the respective secure bus subscribers.
- the serial number stored in the secure bus subscriber and at least one subscriber-specific parameter, in particular the manufacturer identifier and the device type, are transmitted in at least one secure message to the secure control device.
- the serial number is added to the second configuration record if the subscriber-specific parameters contained in the secure message match the subscriber-specific parameters stored in the secure controller with respect to the respective secure subscriber. In this way, the registration of the respective secure bus subscriber takes place at the control and data transmission system.
- the location identifiers to be transmitted by the non-secure communication control unit in the second communication cycle can first be extracted from the secure messages coming from the secure control device and embedded in new secure messages and then transmitted to the respective secure bus subscriber.
- the present method can ensure that the secure messages transmitted by the secure control device to the non-secure control device and containing the individual location identifiers are forwarded unread to the respective secure users.
- the control and data transmission system has a transmission device to which at least one non-secure communication control device and at least one secure subscriber are connected.
- the non-secure communication control device knows the position of all connected to a transmission medium participants.
- the non-secure communication control device has a memory device for storing a first configuration data record which contains information about the position of all connected users, ie secure and / or non-secure users, with respect to the control and data transmission system and an individual location identifier for each secure user.
- the non-secure communication control device is associated with a secure control device which has a memory device for storing a second configuration data record which contains a list of only the switched-on secure subscribers and an individual location identifier for each secure subscriber.
- the secure controller is adapted to generate and transmit a secure message containing the individual location identifier of a secure subscriber to the non-secure communication controller.
- the non-secure controller is configured to transmit individual location identifiers to secure bus subscribers during a first communication cycle and transmit the individual location identifiers from the secure controller to the secure bus subscribers during a second communication cycle.
- Each secure user has memory means for storing a reference location identifier, means for comparing the individual location identifier received during the first and second communication cycles, means for comparing the received individual location identifiers with a reference location identifier, and means for transmitting a secure message secure control device, wherein the secure message contains information about the comparison results.
- the secure controller may, in response to the secure message received from a secure subscriber, prompt an operator to confirm that the secure bus subscriber is included at the predetermined location.
- a device for transferring a secure subscriber and / or the control and data transmission system to a safe state, if the operator is not confirmed in that the corresponding secure bus subscriber is switched on at the predetermined installation location, or if the respective secure bus subscriber determines that the individual location identifiers transmitted in the first and second communication cycle do not match.
- the secure control device is preferably connected via a coupling memory with the non-secure communication control device.
- a programmable control unit may be provided, which in response to the fact that in the first and second communication cycle to a secure Subscribers transmitted individual location identifiers do not match the reference location identifier causes the respective secure bus subscriber to overwrite the reference location identifier by the individual location identifier.
- Fig. 1 shows a schematic representation of a generally designated 10 control and data transmission system in which bus participants are connected to each other annular.
- the control and data transmission system 10 in the present example is an Interbus transmission system in which the invention is implemented.
- the Interbus transmission system is for example in the textbook “ Interbus-S: Fundamentals and Practice "by A. Baginski et al., 1994 Wegig Buchverlag GmbH , Heidelberg.
- Interbus transmission system 10 includes a bus subscriber 30, which is not secure Communication control device acts, and hereinafter briefly called Interbus master.
- the Interbus master 30 is connected to a field bus 70 of the Interbus transmission system 10 and connected, for example via a coupling memory 40 with a secure control device 50.
- the secure controller 50 is a device with a security communications layer. This is also known as SCLM (Safety Communication Layer Master).
- SCLM Safety Communication Layer Master
- the secure control device 50 is required in order to be able to control safety-critical processes via the non-secure Interbus master 30.
- the field bus 70 is symbolically represented by two rings 71 and 72 which, according to the Interbus protocol, represent a first communication cycle, known as the identification cycle, and a second communication cycle, known as a data cycle.
- the bus subscriber 60 is a secure bus subscriber, via which security-critical processes can be carried out in conjunction with the secure control device 50.
- the secure bus subscriber 60 may be a slave with a security communication layer, which is also known as SCLS (Safety Communication Layer Slave).
- SCLS Safety Communication Layer Slave
- Reference numerals 20 and 25 symbolically represent a software tool with the aid of which a user can configure the Interbus transmission system 10.
- the Interbus transmission system 10 is known to one of ordinary skill in the art, it will suffice to point out that the Interbus is a kind of shift register, in which the bus participants are annularly connected to each other and form the individual memory locations of the shift register. Due to this shift register structure, no user addresses are required for the connected bus users on the Interbus. Rather, the Interbus master 30 learns during an identification cycle, hereafter called ID cycle, the positions of the individual bus participants in the ring know. The arrangement of the bus stations in the Interbus is then stored as a process picture in the Interbus master 30.
- ID cycle an identification cycle
- the Interbus master 30 can thus send data to each connected bus subscriber by writing the data destined for the bus users to corresponding points in a telegram forming a summation frame which is sent through the field bus 70.
- the bus participants are able to read the data intended for them from the telegram.
- 3 and 4 exemplary sum frames are shown, which are constructed in accordance with the Interbus protocol and additionally contain location identifiers for the respective secure bus subscribers.
- Fig. 2 is the in Fig. 1 illustrated secure bus participants 60 shown in more detail.
- the secure bus subscriber 60 has two shift register sections.
- the shift register section labeled 80 and 82 is looped into the field bus 70 during one ID cycle, while the other shift register section labeled 84 and 86 is looped into field bus 70 during a data cycle.
- the shift register section located in the fieldbus 70 during the identification cycle has a control register 80 and an ID register 82.
- the one during a data cycle in the field bus 70 shift register section has an input register 84 and an output register 86.
- the secure bus subscriber 60 has a section 65 which essentially contains the safety-relevant part of the bus subscriber. However, the selected structure of the secure bus subscriber is only to be understood as an example.
- the secure bus subscriber 60 has a memory 88, in which, as will be explained in more detail below, a location identifier can be stored, which we will transfer during an ID cycle from the Interbus master 30 to the secure bus station 60.
- a further memory 94 is provided, in which a location identifier can be stored, which is transmitted to the secure bus subscriber 60 during a data cycle.
- a memory 96 is provided in which a reference location identifier can be stored.
- a comparator 92 is provided which can compare the memory contents of the memories 88 and 94 with each other.
- the comparator 92 is further configured to compare the memory contents of the memory 94 or the memory contents of the memory 88 with the memory contents of the memory 96.
- the control of the bus device 60 and the comparator 92 takes over, for example, a microprocessor 90.
- the safety-relevant part 65 of the secure bus device 60 is used in conjunction with the secure control device 50 to check whether the secure bus device 60 actually at the installation of the field bus 70th is turned on, which has provided a user.
- the microprocessor 90 can ensure that secure Messages may be generated into the predetermined information, such as "the memory contents of the memories 88 and 94 are the same", “the memory contents of the memories 88 and 94 do not match", “the memory contents of the memories 88 and 96 are the same””the memory contents of the memories 88 and 96 do not match,” can be embedded and transmitted to the secure controller 50.
- a configuration data record is created for each bus subscriber that is to be connected to the fieldbus 70. This contains, inter alia, information about the position of each connected to the field bus 70 bus station.
- the positions of the bus users result from the sequence in which the bus users are stored in the configuration data sets.
- the configuration data sets contain an individual location identifier for each secure bus subscriber.
- the bus subscribers a and b are designed as secure subscribers to which the individual location identifier 1 or 2 has been assigned.
- Bus subscriber c is implemented as a non-secure bus subscriber. Mention should also be made that the bus subscriber specified under Others in the software tool 20 corresponds to the secure bus subscriber 60.
- each secure bus subscriber a and b advantageously also contains the associated device type and the manufacturer identifier.
- the configuration data record of each secure bus subscriber a and b advantageously also contains the associated device type and the manufacturer identifier.
- step 2 the configuration data sets belonging to the secure bus subscribers a and b are now transferred to the secure programming environment 25.
- the secure bus subscribers are listed here in the configuration data records in an order that corresponds to the order in which the secure bus subscribers are connected to each other on the fieldbus 70.
- step 3a all configuration data sets created in the software tool 20, which record both the secure and the non-secure bus users, are then stored in the Interbus master 30.
- step 3b the configuration data sets of the secure bus subscribers a and b stored in the secure programming level 25 are written to the secure controller 50.
- the Interbus master 30 Due to the configured Interbus transmission system 10, the Interbus master 30 knows the physical position of the bus users connected to the field bus 70 both in the disk register for ID cycles and in the shift register for data cycles: The Interbus master 30 now generates according to the Interbus protocol a summation frame in FIG. 3 is shown by way of example.
- the summation frame is preceded by a so-called loopback word to which the control information fields of the bus subscribers connected to the field bus 70 are connected in an order resulting from the physical position of the respective bus subscribers in the field bus 70 known to the Interbus master 30 ,
- the secure bus subscriber 60 is the last bus subscriber connected in the field bus 70, so that the control information intended for this bus subscriber is located immediately after the loopback word.
- This control information may include an ID code, other control data, and the location identifier 1 of the bus user 60.
- the non-secure bus subscriber c is connected directly to the bus subscriber 60 to the field bus 70, so that the associated control information in the following control information field are stored. Since the secure bus subscriber b is the first bus subscriber with respect to the communication direction in the fieldbus, his control information together with location identifier 2 are in the last control field of the summation frame.
- the sum frame is now transmitted in step 4 during a first communication cycle 71, in the present example, that of the ID cycle according to the Interbus protocol, transmitted via the field bus 70 to the powered-up bus subscribers.
- Each bus subscriber then extracts the control information intended for him from the summation frame.
- the secure bus user 60 writes the control information immediately following the loopback word to the corresponding registers 80 and 82 stored in Figure 3 are shown.
- the location identifier 1 contained in the sum frame is written by the secure bus subscriber 60 into the control register 80.
- the location identifier may comprise, for example, 7 bits. Additional bits in the sum frame may identify the location identifier and make it distinguishable from other control data.
- the individual location identifier 1 can be written from the control register 80 into the memory 88.
- the secure control device 50 generates a secure message for each secure bus subscriber in response to the stored configuration data records, which contains at least the location identifier assigned to the secure bus subscriber.
- a secure message containing the location identifier 1 is thus generated for the secure bus subscriber 60.
- Location identifier 2 is generated for the secure bus subscriber b.
- the secure messages are transferred in step 5 via the coupling memory 40 to the Interbus master 30 in the predetermined order.
- the Interbus master 30 writes the secure messages unread into a sum frame stored in Fig. 4 is shown by way of example.
- the summation frame again comprises a loopback word, a first data field which contains at least the location identifier 1 of the secure bus subscriber 60, a second data field which contains, for example, process data of the non-secure bus subscriber c, and a data field which at least includes the location identifier 2 of the secure bus subscriber c contains.
- the order of the data fields in the sum frame is in turn determined by the order of the bus subscribers connected to the field bus 70. As the Interbus master 30 knows the locations of all bus users connected to the fieldbus 30, depending on the order in which it receives the secure messages from the secure controller 50, it can embed them in the correct locations in the summation frames.
- step 6 the Interbus master 30 transmits the sum frame containing the secure messages, and thus the location identifiers 1 and 2, via fieldbus 70 via a second communication cycle 72 corresponding to the data cycle of the Interbus protocol him certain data in an input register.
- the secure bus subscriber 60 reads the data immediately following the loopback word which contain the location identifier 1 into the input register 84. The location identifier 1 can then be written from the input register 84 into the memory 94.
- a first scenario is considered in which the Interbus transmission system 10 is put into operation for the first time. This means that no reference location identifier has yet been stored in the memory 96. Alternatively, a default value could be stored in the memory 96, which signals the microprocessor 90 that the Interbus transmission system 10 has not yet been put into operation.
- the stored in the memories 88 and 94 individual location identifiers are supplied according to step 7 to the comparator 92, which checks whether the memory contents, ie the stored location identifiers match. If the comparator 92 determines a match between the two location identifiers stored in the memories 88 and 94, the one stored in the memory 88 or in the memory 94 Location identifier 1 are stored directly in the memory 96 as a reference location identifier.
- the microprocessor 90 now generates a secure message in which, for example, the device type, the manufacturer identifier and the serial number of the secure bus user 60 are written.
- the secure message contains an indication that the location identifiers stored in the memories 88 and 94 match.
- This secure message is written to the output register 86.
- the content of the output register 86 is embedded in a corresponding sum frame, which is then applied in step 8 via the output of the bus station 60 to the field bus 70 and from there to the Interbus master 30.
- the Interbus master 30 extracts from the received sum frame all secure messages and transmits them in step 9 via the coupling memory 90 to the secure control device 50.
- the Interbus master 30 unread the secure messages to the secure control device 50th forwards.
- the secure control device 50 learns from the safe message intended for the bus participant 60 that the location identifiers stored in the memory 88 and 94 match. This means that the secure bus subscriber 60 is switched on at the correct installation location within the field bus 70, so that now the secure bus subscriber 60 can log on to the Interbus transmission system 10.
- the registration of the secure bus subscriber 60 takes place in that the serial number contained in the secure message is stored in the secure control device 50.
- the secure controller 50 may according to step 10 on a Display will show a user that the bus station 60 has been connected and logged in at the correct location.
- the secure control device 50 may alternatively or additionally have an interface via which these instructions can be transmitted to an external device.
- the individual location identifiers of the secure bus subscribers 60 and b are transmitted to the respective bus subscribers in a frame constructed as a sum frame.
- the secure bus user 60 reads out the control information intended for it including the location identifier from the telegram and writes the location identifier in the memory 88.
- the secure controller 50 in turn generates secure messages containing the respective location identifiers for the secure bus users 60 and b and transmits them via the coupling memory 40 to the Interbus master 30.
- the Interbus master 30 embeds the secure messages in corresponding locations of a sum frame and transmits the secure messages in a data cycle to the respective secure bus subscribers.
- the secure bus subscriber 60 removes the incoming summation frame the for him certain message and writes the location identifier contained in the memory 94th
- the contents of the two memories 88 and 94 are compared with each other.
- comparator 92 For a first sub-case, assume that comparator 92 has determined that the memory contents of memories 88 and 94 are the same. This means that the location identifiers transmitted in the two separate communication cycles are identical. Thereupon, the comparator 92 compares the reference location identifier stored in the memory 96 with the location identifier stored in the memory 88 or in the memory 94. If the individual location identifier coincides with the reference location identifier, it is ensured that the secure bus subscriber 60 is connected to the installation location provided within the fieldbus 70 for him. Under control of the microprocessor 90, a secure message is then generated containing at least information that the reference location identifier and location identifiers stored in the memories 88 and 94 match.
- the secure message may include the manufacturer identifier, serial number, and / or device type of the secure bus participant 60.
- the secure message is buffered in the output register 86. During a corresponding data cycle, it is embedded in a summation frame and transmitted to the secure control device 50 via the Interbus master 30 and the coupling memory 40.
- the secure controller 50 signals to the user that the secure bus user 60 has received the same location identifier in both the first and second communication cycles. further coincident with the stored reference location identifier. This ensures that the bus subscriber 60 is switched on at the predetermined installation location.
- the Interbus transmission system 10 may start up and process data may be transmitted.
- the microprocessor 90 causes the secure bus user 60 to transition to a secure state, generate a secure message containing at least the device type of the secure bus user 60, and transmit it to the secure controller 50.
- the secure controller 50 may inform the user that an error has occurred. The secure controller 50 may then automatically or by the user cause the entire Interbus transmission system 10 to shut down or to transfer to a secure state.
- the microprocessor 90 generates a secure message, which preferably contains the device type, the manufacturer identifier, the serial number of the secure bus user 60, and information that indicates that a system error has occurred or the secure bus subscriber has been replaced or switched on at another installation location.
- the secure message is transmitted to the secure controller 50 via the interbus master during a data cycle in a summation frame.
- the secure controller 50 notifies the user in step 10 that the individual location identifier transmitted to secure bus participant 60 does not match the reference location identifier stored in memory 96.
- One reason for this may be that the user has either replaced the secure bus subscriber 60 or turned it on at another location within the fieldbus 70.
- the device type and / or the serial number of the secure bus device 60 and stored in the secure control device 50 configuration records can be checked whether a subscriber exchange has taken place or if for other reasons a wrong location identifier the safe Bus subscriber 60 has been transmitted.
- the user If the user has actually replaced the secure bus user 60 and the manufacturer identifier received in the secure message and / or the device type matches the configuration data set stored in the secure controller 50, the user is prompted to change the location identifier to the secure controller 50 confirm or reject. If the user has confirmed the location change, the serial number of the respective secure bus subscriber in the configuration data set, which is stored in the secure control device 50, overwritten.
- the secure control device 50 can according to an embodiment then a secure message containing the confirmation notice and, for example, the location identifier, the device type and / or the manufacturer identifier of the new secure bus subscriber transmitted to the Interbus master 30, which then in another data cycle transmits the secure message in a summation frame to the new secure bus subscriber.
- the microprocessor 90 of the new secure bus user ensures that the location identifier stored in memory 88 or in memory 94 is taken into memory 96 as the new reference location identifier.
- the new location identifier can also be taken from the memory 88 or from the memory 94 into the memory 96 without prior confirmation of the new installation location by the user.
- the secure control device 50 and / or the secure bus user ensures that the secure bus subscriber and / or the control and data transmission system are moved to a safe state.
- a subscriber exchange or the switching on of a secure bus subscriber to another installation location can also be detected, even if they happen to be there during a first and a second time Communication cycle transmitted location identifiers with the memory 96 stored in the reference location identifier match.
- the secure control device 50 can check on the basis of the serial number or manufacturer identifier transmitted by the secure bus subscriber in the secure message by comparison with the stored configuration data records as to whether a subscriber exchange has taken place.
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Abstract
Description
Die Erfindung betrifft ein Verfahren zum Überprüfen des Einbauortes wenigstens eines sicheren, an eine Steuer- und Datenübertragungsanlage angeschalteten Kommunikatiönsteilnehmers sowie eine Steuer- und Datenübertragungsanlage, die insbesondere zur Durchführung dieses Verfahrens geeignet ist.The invention relates to a method for checking the installation location of at least one secure communication device connected to a control and data transmission system and a control and data transmission system which is particularly suitable for carrying out this method.
Steuer- und Datenübertragungsanlagen nehmen heute aufgrund des damit möglichen hohen Automatisierungsgrades eine herausragende Stellung in der industriellen Fertigung und Anlagensteuerung ein. Sehr verbreitet ist die Verwendung eines Kommunikationssystems, über das eine Vielzahl dezentraler Ein- und Ausgabeeinheiten mit einer zentralen Steuerungseinrichtung verbunden werden.Control and data transmission systems today occupy an outstanding position in industrial production and plant control due to the high degree of automation that is possible with it. Very widespread is the use of a communication system, via which a plurality of decentralized input and output units are connected to a central control device.
Zur Einhaltung von Sicherheitsstandards bei der Durchführung sicherheitskritischer Prozesse werden in der Automatisierungstechnik vorwiegend Kommunikationssysteme eingesetzt, die beispielsweise einen CAN-Bus, Profibus oder INTERBUS in Verbindung mit sicherheitsgerichteten Buskomponenten enthalten. Bei sicherheitsgerichteten Prozessen werden zum Beispiel Schutzgitter und Schutztüren überwacht sowie Zweihand-Schalter und Not-Aus-Schalter angesteuert. Die an ein solches Kommunikationssystem angeschlossenen Buskomponenten werden im Folgenden auch als Teilnehmer oder Busteilnehmer bezeichnet. Sicherheitsgerichtete Buskomponenten werden auch als sichere Busteilnehmer bezeichnet, die zusammen mit nicht sicheren Busteilnehmern an einem solchen Kommunikationssystem angeschlossen werden können.In order to comply with safety standards when carrying out safety-critical processes, automation systems primarily use communication systems that include, for example, a CAN bus, Profibus or INTERBUS in conjunction with safety-related bus components. In safety-related processes, protective gratings and protective doors are monitored, for example, and two-hand switches and emergency stop switches are activated. The bus components connected to such a communication system are also referred to below as Subscriber or bus user called. Safety-related bus components are also referred to as safe bus subscribers, which can be connected to non-secure bus subscribers in such a communication system.
Es ist bekannt, einem sicheren Busteilnehmer zur Erhöhung der Sicherheit eine individuelle Teilnehmeradresse zuzuordnen, welche beispielsweise direkt am Busteilnehmer eingestellt werden kann.It is known to associate a secure subscriber to increase the security of an individual subscriber address, which can be set, for example, directly on the bus subscriber.
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Mit keinem der eingangs genannten Systeme ist es jedoch möglich ohne Verwendung von Adressschaltern an sicheren Teilnehmern sowohl bei der ersten Inbetriebnahme als auch bei wiederholtem Anlauf einer Steuer- und Datenübertragungsanlage zuverlässig prüfen zu können, ob ein sicherer Teilnehmer auch wirklich am gewünschten Einbauort der Steuer- und Datenübertragungsanlage angeschaltet ist.With none of the systems mentioned above, however, it is possible without the use of address switches to secure participants both at the first startup as well as repeated startup of a control and data transmission to reliably check whether a secure participant really at the desired installation location of the control and Data transmission system is turned on.
Der vorliegenden Erfindung liegt demzufolge die Aufgabe zugrunde, ein Verfahren sowie eine Steuer- und Datenübertragungsanlage bereitzustellen, mit denen eine zuverlässige Überprüfung des Einbauorts eines sicheren Teilnehmers jederzeit möglich ist.The present invention is therefore an object of the invention to provide a method and a control and data transmission system with which a reliable verification of the installation of a secure participant is possible at any time.
Ein Kerngedanke der Erfindung ist darin zu sehen, in zwei unabhängigen Kommunikationszyklen einem sicheren Teilnehmer eine Ortskennung zu übermitteln und dann einen Bezug zwischen der, dem sicheren Teilnehmer zugeordneten Ortskennung und dessen Einbauort derart herzustellen, dass zuverlässig geprüft werden kann, ob der sichere Teilnehmer an dem Einbauort angeschaltet ist, den ein Anwender auch tatsächlich dafür vorgesehen hat.An essential idea of the invention is to transmit a location identifier to a secure subscriber in two independent communication cycles and then establish a relationship between the location identifier assigned to the secure subscriber and its location so that it can be reliably checked whether the secure subscriber is at the Installation site is turned on, a user has actually provided for it.
Das oben genannte technische Problem wird zum einen durch die Verfahrensschritte des Anspruchs 1 gelöst.The above technical problem is solved on the one hand by the method steps of
Danach ist ein Verfahren zum Überprüfen des Einbauortes wenigstens eines sicheren, an eine Steuer- und Datenübertragungsanlage angeschalteten Teilnehmers vorgesehen, wobei an die Steuer- und Datenübertragungsanlage eine nicht sichere Kommunikationssteuereinrichtung angeschaltet ist, welcher eine sichere Steuereinrichtung zugeordnet ist. Die nicht sichere Kommunikationssteuereinrichtung kennt die Position jedes angeschalteten Teilnehmers in der Steuer- und Datenübertragungsanlage.Thereafter, a method for checking the installation location of at least one secure subscriber connected to a control and data transmission system is provided, wherein a non-secure communication control device is connected to the control and data transmission system, to which a secure control device is assigned. The non-secure communication control device knows the position of each connected subscriber in the control and data transmission system.
In der nicht sicheren Kommunikationssteuereinrichtung wird ein erster Konfigurationsdatensatz abgelegt, der Angaben über die Position aller angeschalteten Teilnehmer bezüglich der Steuer- und Datenübertragungsanlage und eine individuelle Ortskennung für jeden sicheren Teilnehmer enthält. Der Konfigurationsdatensatz kann von einem Anwender erstellt werden, der die Steuer- und Datenübertragungsanlage nach seinen Verstellungen projektieren will. Mit anderen Worten spiegelt der erst Konfigurationsdatensatz vorzugsweise den projektierten Aufbau der Steuer- und Datenübertragungsanlages wieder. Ein zweiter Konfigurationsdatensatz wird in der sicheren Steuereinrichtung abgelegt. Der zweite Konfigurationsdatensatz enthält eine Liste nur der angeschalteten sicheren Teilnehmer sowie eine individuelle Ortskennung für jeden sicheren Teilnehmer.In the non-secure communication control device, a first configuration data record is stored, the information about the position of all connected participants with respect to the control and data transmission system and an individual location identifier for each secure subscriber contains. The configuration data set can be created by a user who wants to configure the control and data transmission system according to its settings. In other words, the first configuration data set preferably reflects the projected structure of the control and data transmission system. A second configuration record is stored in the secure controller. The second configuration data record contains a list of only the switched-on secure subscribers and an individual location identifier for each secure subscriber.
An dieser Stelle sei erwähnt, dass insbesondere bei Steuer-und Datenübertragungsanlagen gemäß dem Interbus-Standard entsprechende Konfigurations-Tools bekannt sind, mit denen der Anwender die entsprechenden Konfigurationsdatensätze erstellen kann.At this point it should be mentioned that in particular in control and data transmission systems according to the Interbus standard corresponding configuration tools are known, with which the user can create the corresponding configuration data sets.
Nach dieser eigentlichen Konfigurationsphase werden in einem ersten Kommunikationszyklus jeweils eine individuelle Ortskennung von der nicht sicheren Kommunikationssteuereinrichtung zu jedem sicheren Teilnehmer, der an der Steuer- und Datenübertragungsanlage angeschaltet ist, übertragen. Die im zweiten Konfigurationsdatensatz enthaltenen individuellen Ortskennungen werden in sicheren Nachrichten von der sicheren Steuereinrichtung zur nicht sicheren Kommunikationssteuereinrichtung übertragen. Nunmehr werden in einem zweiten Kommunikationszyklus die in den empfangenen sicheren Nachrichten enthaltenen individuellen Ortskennungen von der nicht sicheren Kommunikationssteuereinrichtung zu den jeweiligen sicheren Teilnehmern übertragen. Jeder sichere Teilnehmer vergleicht die im ersten und zweiten Kommunikätionszyklus empfangen individuellen Ortskennungen. Wenn ein sicherer Teilnehmer eine Übereinstimmung zwischen den individuellen Ortskennungen feststellt, wird geprüft, ob in dem jeweiligen sicheren Teilnehmer bereits eine Referenz-Ortskennung abgelegt ist. Ist eine Referenz-Ortskennung in dem jeweiligen sicheren Teilnehmer abgelegt, wird die individuelle Ortskennung, die im ersten oder im zweiten Kommunikationszyklus empfangen worden ist, mit der Re.ferenz-Ortskennung verglichen. Stimmt die individuelle Ortskennung mit der gespeicherten Referenz-Ortskennung des jeweiligen sicheren Teilnehmers überein, wird der sicheren Steuereinrichtung signalisiert, dass der jeweilige sichere Busteilnehmer am vorbestimmten Einbauort angeschaltet ist.After this actual configuration phase, in a first communication cycle, in each case an individual location identifier is transmitted from the non-secure communication control device to each secure subscriber which is connected to the control and data transmission system. The individual location identifiers contained in the second configuration record are transmitted in secure messages from the secure controller to the non-secure communication controller. Now, in a second communication cycle, the individual location identifiers contained in the received secure messages are transmitted from the non-secure communication controller to the respective secure subscribers. Each secure subscriber compares the received in the first and second communication cycle individual location identifiers. If a secure subscriber determines a match between the individual location identifiers, it is checked whether a reference location identifier has already been stored in the respective secure subscriber. If a reference location identifier is stored in the respective secure subscriber, the individual location identifier which has been received in the first or in the second communication cycle is compared with the Re.ferenz location identifier. If the individual location identifier matches the stored reference location code of the respective secure subscriber, the secure controller is signaled that the respective secure bus subscriber is switched on at the predetermined installation location.
Dank der Übertragung einer individuellen Ortskennung in zwei separaten Kommunikationszyklen und dem Vergleich der empfangenen individuellen Ortskennungen mit einer im sicheren Teilnehmer gespeicherten Referenz-Ortskennung kann zuverlässig geprüft werden, ob der jeweilige sichere Teilnehmer auch tatsächlich an dem vom Anwender vorgesehenen Einbauort der Steuer- und Datenübertragungsanlage angeschaltet ist.Thanks to the transmission of an individual location identifier in two separate communication cycles and the comparison of the received individual location identifiers with a stored in the secure subscriber reference location identifier can be reliably checked whether the respective secure participants actually turned on at the intended by the user installation of the control and data transmission system is.
Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.Advantageous developments are the subject of the dependent claims.
Das Verfahren zur Überprüfung des Einbauortes eines sicheren Busteilnehmers ist auch dazu geeignet, bei der ersten Inbetriebnahme der Steuer- und Datenübertragungsanlage zuverlässig prüfen zu können, ob alle sicheren Teilnehmer auch an den Einbauorten angeschaltet sind, die bei der Konfigurationsphase vom Anwender vorgegeben worden sind. Hierzu wird die im ersten oder zweiten Kommunikationszyklus übertragene individuelle Ortskennung als Referenz-Ortskennung im jeweiligen sicheren Teilnehmer gespeichert, wenn bisher noch keine Referenz-Ortskennung oder alternativ eine vorbestimmte Standard-Referenz-Ortskennung abgelegt worden ist. Die sichere Steuereinrichtung erhält von dem jeweiligen sicheren Teilnehmer eine sichere Nachricht, die Informationen darüber enthält, dass die in dem ersten und zweiten Kommunikationszyklus übertragenen Ortskennungen übereinstimmen und dass noch keine Referenz-Ortskennung im jeweiligen sicheren Teilnehmer gespeichert ist. Unter Ansprechen auf die empfangene sichere Nachricht informiert die sichere Steuereinrichtung eine Bedienperson darüber, dass die in dem ersten und zweiten Kommunikationszyklus übertragenen Ortskennungen übereinstimmen und dass noch keine Referenz-Ortskennung im jeweiligen sicheren Teilnehmer gespeichert ist. Die sichere Steuereinrichtung fordert dann die Bedienperson auf, zu bestätigen, dass der jeweilige sichere Teilnehmer am vorbestimmten Einbauort angeschaltet ist.The method for checking the installation location of a secure bus subscriber is also suitable for being able to reliably check during the first startup of the control and data transmission system whether all the secure subscribers are also connected to the installation locations specified by the user during the configuration phase. For this purpose, the individual transmitted in the first or second communication cycle Location identifier stored as a reference location identifier in the respective secure subscriber, if so far no reference location identifier or alternatively a predetermined standard reference location identifier has been stored. The secure control device receives from the respective secure subscriber a secure message containing information that the transmitted in the first and second communication cycle location identifiers match and that no reference location identifier is stored in each secure subscriber. In response to the received secure message, the secure controller informs an operator that the location identifiers transmitted in the first and second communication cycles match and that no reference location identifier has yet been stored in the respective secure subscriber. The secure controller then requests the operator to confirm that the respective secure subscriber is turned on at the predetermined location.
Auch während eines erneuten Anlaufs der Steuer- und Datenübertragungsanlages kann jederzeit zuverlässig überprüft werden, ob die jeweiligen sicheren Teilnehmer am richtigen Einbauort angeschaltet sind. Hierzu wird bei einer Übereinstimmung-der im ersten und zweiten Kommunikationszyklus empfangenen individuellen Ortskennungen die im jeweiligen sicheren Teilnehmer gespeicherte Referenzen-Ortskennung mit der individuellen Ortskennung verglichen. Wenn die Referenz-Ortskennung nicht mit der individuellen Ortskennung übereinstimmt, wird die Referenz-Ortskennung durch die jeweilige individuelle Ortskennung überschrieben. Der jeweilige sichere Teilnehmer sendet dann eine sichere Nachricht zur sicheren Steuereinrichtung, die Informationen darüber enthält, dass die im ersten und zweiten Kommunikationszyklus empfangenen individuellen Ortskennungen nicht mit der gespeicherten Referenz-Ortskennung übereinstimmen. Die sichere Steuereinrichtung kann unter Ansprechen auf die empfangene sichere Nachricht die Bedienperson entsprechend informieren und auffordern, den Einbauort des jeweiligen sicheren Busteilnehmers zu bestätigen.Even during a restart of the control and Datenübertragungsanlages can be reliably checked at any time, whether the respective safe participants are turned on at the correct installation location. For this purpose, if the individual location identifiers received in the first and second communication cycle match, the reference location identifier stored in the respective secure subscriber is compared with the individual location identifier. If the reference location identifier does not match the individual location identifier, the reference location identifier is overwritten by the respective individual location identifier. The respective secure subscriber then sends a secure message to the secure controller containing information that the individual location identifiers received in the first and second communication cycles do not match the stored reference location identifier. In response to the received secure message, the secure controller may appropriately inform and prompt the operator to confirm the location of installation of the particular secure bus subscriber.
Damit sichere Nachrichten zwischen sicheren Teilnehmern und der sichern Steuereinrichtung übertragen werden können, können vorab beispielsweise sogenannte Connection IDs gemäß dem in der
Mit dem vorliegenden Verfahren zum Überprüfen des Einbauortes ist es möglich, Fehler in der Konfiguration der Steuer- und Datenübertragungsanlage, dem Aufbau und der Adressierung der Steuer- und Datenübertragungsanlage sowie andere Anwenderfehler zu erkennen. Dadurch kann vermieden werden, dass die Steuer- und Datenübertragungsanlage beschädigt und/oder Bedienpersonen verletzt werden. Hierzu werden die jeweiligen sicheren Teilnehmer und/oder die Steuer- und Datenübertragungsanlage in einen sicheren Zustand überführt, wenn die Bedienperson nicht bestätigt, dass der jeweilige sichere Teilnehmer am vorbestimmten Einbauort angeschaltet ist, oder wenn der jeweilige sichere Teilnehmer keine Übereinstimmung der im ersten und zweiten Kommunikationszyklus übertragenen individuellen Ortskennungen feststellt.With the present method for checking the installation location, it is possible to detect errors in the configuration of the control and data transmission system, the structure and addressing of the control and data transmission system as well as other user errors. This can avoid that the control and data transmission system damaged and / or operators are injured. For this purpose, the respective secure subscribers and / or the control and data transmission system are transferred to a safe state if the operator does not confirm that the respective secure subscriber is turned on at the predetermined location, or if the respective secure subscriber does not match the first and second Communication cycle transmitted individual location identifiers.
Um sicherstellen zu können, dass im sicheren Teilnehmer eine Referenz-Ortskennung nur gespeichert wird, wenn der jeweilige sichere Busteilnehmer auch am gewünschten Einbauort angeschaltet ist, wird die Referenz-Ortskennung im jeweiligen sicheren Teilnehmer erst dann durch die individuelle Ortskennung ersetzt, wenn die Bedienperson zuvor bestätigt hat, dass der jeweilige sichere Teilnehmer am vorbestimmten Einbauort angeschaltet ist.In order to be able to ensure that a reference location identifier is only stored in the secure subscriber if the respective secure bus subscriber is also at the desired location Installation site is turned on, the reference location identifier is replaced in the respective secure subscriber only by the individual location identifier when the operator has previously confirmed that the respective secure subscriber is turned on at the predetermined location.
Das Verfahren kann besonders vorteilhaft angewendet werden, wenn die Steuer- und Datenübertragungsanlage ringförmig und als Feldbus gemäß dem Interbus-Standard ausgebildet ist. In diesem Fall müssen den am Feldbus angeschalteten Teilnehmern, die auch Busteilnehmer genannt werden, keine Teilnehmeradressen zugeordnet werden. Denn der Interbus arbeitet in der Art eines Schieberegisters, bei dem die Busteilnehmer ringförmig miteinander verbunden sind und die einzelnen Speicherplätze des Schieberegisters bilden. Aufgrund dieser speziellen Interbus-Konfiguration kann die nicht sichere Kommunikationssteuereinrichtung die Position aller Busteilnehmer während eines Identifikations-Zyklus und/oder Datenzyklus kennen lernen, und zwar sowohl hinsichtlich der Schieberegister für ID-Zyklen als auch hinsichtlich der Position im Schieberegister für Datenzyklen. Wird ein Interbus als Steuer- und Datenübertragungsanlage verwendet, entspricht der erste Kommunikationszyklus dem ID-Zyklus und der zweite Kommunikationszyklus dem Datenzyklus des Interbus-Protokolls. Die individuellen Ortkennungen, die für die an den Feldbus angeschalteten sicheren Busteilnehmern bestimmt sind, werden an den entsprechenden Stellen innerhalb eines Summenrahmens von der nicht sicheren Kommunikationssteuereinrichtung zu den jeweiligen sicheren Busteilnehmern übertragen.The method can be used particularly advantageously if the control and data transmission system is annular and designed as a fieldbus according to the Interbus standard. In this case, the subscribers connected to the fieldbus, which are also called bus subscribers, no subscriber addresses must be assigned. Because the Interbus works in the manner of a shift register, in which the bus participants are annularly connected to each other and form the individual memory locations of the shift register. Due to this particular Interbus configuration, the non-secure communication controller may become aware of the position of all bus subscribers during an identification cycle and / or data cycle, both in terms of ID shift shift registers and position in the data cycle shift register. If an Interbus is used as a control and data transmission system, the first communication cycle corresponds to the ID cycle and the second communication cycle corresponds to the data cycle of the Interbus protocol. The individual location identifiers destined for the secure bus subscribers connected to the fieldbus are transmitted at the corresponding locations within a sum frame from the non-secure communication control device to the respective secure bus subscribers.
Um sichere Busteilnehmer bei der ersten Inbetriebnahme der Steuer- und Datenübertragungsanlage oder bei einem Teilnehmertausch zuverlässig an der Steuer- und Datenübertragungsanlage anmelden zu können, werden die im sicheren Busteilnehmer gespeicherte Seriennummer und wenigstens ein teilnehmerspezifischer Parameter, insbesondere die Herstellerkennung und der Gerätetyp, in wenigstens einer sicheren Nachricht zur sicheren Steuereinrichtung übertragen. Die Seriennummer wird dem zweiten Konfigurationsdatensatz hinzugefügt, wenn die in der sicheren Nachricht enthaltenen teilnehmerspezifischen Parameter mit den teilnehmerspezifischen Parametern übereinstimmen, die hinsichtlich des jeweiligen sicheren Teilnehmers in der sicheren Steuereinrichtung abgespeichert sind. Auf diese Weise erfolgt die Anmeldung des jeweiligen sicheren Busteilnehmers an der Steuer- und Datenübertragungsanlage.To secure bus participants at the first commissioning of the control and data transmission system or at a To be able to log subscriber exchange reliably to the control and data transmission system, the serial number stored in the secure bus subscriber and at least one subscriber-specific parameter, in particular the manufacturer identifier and the device type, are transmitted in at least one secure message to the secure control device. The serial number is added to the second configuration record if the subscriber-specific parameters contained in the secure message match the subscriber-specific parameters stored in the secure controller with respect to the respective secure subscriber. In this way, the registration of the respective secure bus subscriber takes place at the control and data transmission system.
Die im zweiten Kommunikationszyklus von der nicht sicheren Kommunikationssteuereinheit zu übertragenden Ortskennungen können zunächst aus den von der sicheren Steuereinrichtung kommenden sicheren Nachrichten extrahiert und in neue sichere Nachrichten eingebettet und dann zum jeweiligen sicheren Busteilnehmer übertragen werden.The location identifiers to be transmitted by the non-secure communication control unit in the second communication cycle can first be extracted from the secure messages coming from the secure control device and embedded in new secure messages and then transmitted to the respective secure bus subscriber.
Um die Sicherheitsanforderungen bei sicherheitskritischen Prozessen einhalten zu können, kann das vorliegende Verfahren dafür sorgen, dass die von der sicheren Steuereinrichtung an die nicht sichere Steuereinrichtung übertragenen sicheren Nachrichten, welche die individuellen Ortskennungen enthalten, ungelesen an die jeweiligen sicheren Teilnehmer weitergeleitet werden.In order to be able to meet the security requirements for safety-critical processes, the present method can ensure that the secure messages transmitted by the secure control device to the non-secure control device and containing the individual location identifiers are forwarded unread to the respective secure users.
Das oben genannte technische Problem wird ebenfalls durch die Merkmale des Anspruchs 10 gelöst.The above technical problem is also solved by the features of
Danach ist eine Steuer-und Datenübertragungsanlage vorgesehen, die insbesondere der Durchführung des Verfahrens nach einem der Ansprüche 1 bis 9 dient.Thereafter, a control and data transmission system is provided which serves in particular to carry out the method according to one of
Die Steuer- und Datenübertragungsanlage weist eine Übertragungseinrichtung auf, an welcher wenigstens eine nicht sichere Kommunikationssteuereinrichtung und wenigstens ein sicherer Teilnehmer angeschaltet sind. Die nicht sichere Kommunikationssteuereinrichtung kennt die Position aller an ein Übertragungsmedium angeschalteten Teilnehmer. Weiterhin weist die nicht sichere Kommunikationssteuereinrichtung eine Speichereinrichtung zum Speichern eines ersten Konfigurationsdatensatzes auf, der Angaben über die Position aller angeschalteten Teilnehmer, das sind sichere und/oder nicht sichere Teilnehmer, bezüglich der Steuer- und Datenübertragungsanlages und eine individuelle Ortskennung für jeden sicheren Teilnehmer enthält. Weiterhin ist der nicht sicheren Kommunikationssteuereinrichtung eine sichere Steuereinrichtung zugeordnet, die eine Speichereinrichtüng zum Speichern eines zweiten Konfigurationsdatensatzes aufweist, der eine Liste nur der angeschalteten sicheren Teilnehmer sowie eine individuelle Ortskennung für jeden sicheren Teilnehmer enthält. Die sichere Steuereinrichtung ist zum Erzeugen und Übertragen einer sicheren Nachricht, die die individuelle Ortskennung eines sicheren Teilnehmers enthält, zur nicht sicheren Kommunikationssteuereinrichtung ausgebildet. Die nicht sichere Steuereinrichtung ist zum Übertragen von individuellen Ortskennungen zu sicheren Busteilnehmern während eines ersten Kommunikationszyklus und zum Übertragen der von der sicheren Steuereinrichtung kommenden individuellen Ortskennungen zu den sicheren Busteilnehmern während eines zweiten Kommunikationszyklus ausgebildet.The control and data transmission system has a transmission device to which at least one non-secure communication control device and at least one secure subscriber are connected. The non-secure communication control device knows the position of all connected to a transmission medium participants. Furthermore, the non-secure communication control device has a memory device for storing a first configuration data record which contains information about the position of all connected users, ie secure and / or non-secure users, with respect to the control and data transmission system and an individual location identifier for each secure user. Furthermore, the non-secure communication control device is associated with a secure control device which has a memory device for storing a second configuration data record which contains a list of only the switched-on secure subscribers and an individual location identifier for each secure subscriber. The secure controller is adapted to generate and transmit a secure message containing the individual location identifier of a secure subscriber to the non-secure communication controller. The non-secure controller is configured to transmit individual location identifiers to secure bus subscribers during a first communication cycle and transmit the individual location identifiers from the secure controller to the secure bus subscribers during a second communication cycle.
Jeder sichere Teilnehmer weist eine Speichereinrichtung zum Speichern einer Referenz-Ortskennung, eine Einrichtung zum Vergleichen der während des ersten und zweiten Kommunikationszyklus empfangenen individuellen Ortskennung, eine Einrichtung zum Vergleichen der empfangenen individuellen Ortskennungen mit einer Referenz-Ortskennung und eine Einrichtung zum Übertragung einer sicheren Nachricht zur sicheren Steuereinrichtung auf, wobei die sichere Nachricht eine Information über die Vergleichsergebnisse enthält. Die sichere Steuereinrichtung kann unter Ansprechen auf die von einem sicheren Teilnehmer empfangene sichere Nachricht eine Bedienperson auffordern, zu bestätigen, dass der sichere Busteilnehmer am vorbestimmten Einbauort enthalten ist.Each secure user has memory means for storing a reference location identifier, means for comparing the individual location identifier received during the first and second communication cycles, means for comparing the received individual location identifiers with a reference location identifier, and means for transmitting a secure message secure control device, wherein the secure message contains information about the comparison results. The secure controller may, in response to the secure message received from a secure subscriber, prompt an operator to confirm that the secure bus subscriber is included at the predetermined location.
Um im Fehlerfall eine Beschädigung der Steuer- und Datenübertragungsanlage sowie eine Verletzung von Personen verhindern zu können, ist eine Einrichtung zum Überführen eines sicheren Teilnehmers und/oder der Steuer- und Datenübertragungsanlage in einen sicheren Zustand vorgesehen, und zwar dann, wenn die Bedienperson nicht bestätigt, dass der entsprechende sichere Busteilnehmer am vorbestimmten Einbauort angeschaltet ist, oder wenn der jeweilige sichere Busteilnehmer feststellt, dass die im ersten und zweiten Kommunikationszyklus übertragenen individuellen Ortskennungen nicht übereinstimmen.In order to be able to prevent damage to the control and data transmission system as well as personal injury in the event of an error, a device is provided for transferring a secure subscriber and / or the control and data transmission system to a safe state, if the operator is not confirmed in that the corresponding secure bus subscriber is switched on at the predetermined installation location, or if the respective secure bus subscriber determines that the individual location identifiers transmitted in the first and second communication cycle do not match.
Die sichere Steuereinrichtung ist vorzugsweise über einen Koppelspeicher mit der nicht sicheren Kommunikationssteuereinrichtung verbunden.The secure control device is preferably connected via a coupling memory with the non-secure communication control device.
Weiterhin kann eine programmierbare Steuereinheit vorgesehen sein, die unter Ansprechen darauf, dass die im ersten und zweiten Kommunikationszyklus zu einem sicheren Teilnehmer übertragenen individuellen Ortskennungen nicht mit der Referenz-Ortskennung übereinstimmen, den jeweiligen sicheren Busteilnehmer veranlasst, die Referenz-Ortskennung durch die individuelle Ortskennung zu überschreiben.Furthermore, a programmable control unit may be provided, which in response to the fact that in the first and second communication cycle to a secure Subscribers transmitted individual location identifiers do not match the reference location identifier causes the respective secure bus subscriber to overwrite the reference location identifier by the individual location identifier.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels in Verbindung mit den beigefügten Zeichnungen näher erläutert.The invention will be explained in more detail below with reference to an embodiment in conjunction with the accompanying drawings.
Es zeigen:
- Fig. 1
- eine beispielhafte Steuer- und Datenübertragungsanlage, in der die Erfindung verwirklicht ist,
- Fig. 2
- ein detailliertes Blockschaltbild des in
gezeigten sicheren Busteilnehmers,Figur 1 - Fig. 3
- einen während eines Identifikationszyklus übertragenen Summenrahmen gemäß dem Interbus-Protokoll, und
- Fig. 4
- einen während eines Datenzyklus übertragenen Summenrähmen gemäß dem Interbus-Protokoll.
- Fig. 1
- an exemplary control and data transmission system, in which the invention is realized,
- Fig. 2
- a detailed block diagram of the in
FIG. 1 shown secure bus participant, - Fig. 3
- a summation frame transmitted during an identification cycle according to the Interbus protocol, and
- Fig. 4
- a sum frame transmitted during a data cycle according to the Interbus protocol.
Das in
Da das Interbus-Übertragungssystem 10 einem Durchschnittsfachmann bekannt ist, genügt es darauf hinzuweisen, dass der Interbus eine Art Schieberegister ist, bei dem die Busteilnehmer ringförmig miteinander verbunden sind und die einzelnen Speicherplätze des Schieberegisters bilden. Aufgrund dieser Schieberegister-Struktur werden beim Interbus keine Teilnehmeradressen für die angeschalteten Busteilnehmer benötigt. Vielmehr lernt der Interbus-Master 30 während eines IdentifizierungsZyklus, nachfolgend kurz ID-Zyklus genannt, die Positionen der einzelnen Busteilnehmer im Ring kennen. Die Anordnung der Busteilnehmer im Interbus wird dann als Prozessbild im Interbus-Master 30 hinterlegt. Der Interbus-Master 30 kann somit jedem angeschalteten Busteilnehmer Daten zukommen lassen, indem er die für die Busteilnehmer bestimmten Daten in entsprechende Stellen eines einen Summenrahmen bildenden Telegramms schreibt, welches durch den Feldbus 70 geschickt wird. Die Busteilnehmer sind in der Lage, die für sie bestimmte Daten aus dem Telegramm auszulesen. In
In
Nachfolgend wird die Funktionsweise des Interbus-Übertragungssystems 10 in Verbindung mit den
Zunächst wird während der Konfigurationsphase in Schritt 1 gemäß
Neben der Ortskennung enthält der Konfiguratinsdatensatz jedes sicheren Busteilnehmers a und b vorteilhafterweise noch den dazugehörenden Geräte-Typ sowie die Hersteller-Kennung. An dieser Stelle sei erwähnt, dass in jedem an den Feldbus 70 angeschalteten sicheren Busteilnehmer neben dem Geräte-Typ und der Hersteller-Kennung noch die Seriennummer abgespeichert sind.In addition to the location identifier, the configuration data record of each secure bus subscriber a and b advantageously also contains the associated device type and the manufacturer identifier. At this point, it should be mentioned that in each
In Schritt 2 gemäß
Augrund des konfigurierten Interbus-übertragungsystems 10 kennt der Interbus-Master 30 die physikalische Postion der am Feldbus 70 angeschalteten Busteilnehmer sowohl im Scheiberegister für ID-Zyklen als auch im Schieberegister für Daten-Zyklen: Entsprechend dem Interbus-Protokoll erstellt der Interbus-Master 30 nunmehr einen Summenrahmen, der in
Der Summenrahmen wird nunmehr in Schritt 4 während eines ersten Kommunikationszyklus 71, im vorliegenden Beispiel ist das der ID-Zyklus-gemäß dem Interbus-Protokoll, über den Feldbus 70 zu den angeschalteten Busteilnehmern übertragen. Jeder Busteilnehmer entnimmt dann die für ihn bestimmten Steuerinformationen aus dem Summenrahmen. So schreibt der sichere Busteilnehmer 60 die Steuerinformationen, die dem Loopbackword unmittelbar folgen, in die entsprechenden Register 80 und 82, die in
Angemerkt sei, dass die Ortskennung beispielsweise 7 Bits umfassen kann. Zusätzliche Bits im Summenrahmen können die Ortskennung kennzeichnen und dafür sorgen, dass sie von anderen Steuerdaten unterschieden werden kann.It should be noted that the location identifier may comprise, for example, 7 bits. Additional bits in the sum frame may identify the location identifier and make it distinguishable from other control data.
Die individuelle Ortskennung 1 kann je nach Implementierung des sicheren Busteilnehmers 60 aus dem Steuerregister 80 in in den Speicher 88 geschrieben werden.Depending on the implementation of the
Weiterhin erzeugt die sichere Steuereinrichtung 50 für jeden sicheren Busteilnehmer unter Ansprechen auf die hinterlegten Konfigurationsdatensätze eine sichere Nachricht, die zumindest die dem sicheren Busteilnehmer zugeordnete Ortskennung enthält. Im vorliegenden Beispiel wird somit eine sichere Nachricht, welche die Ortskennung 1 enthält, für den sicheren Busteilnehmer 60 erzeugt. Eine weitere sichere Nachricht, welche die individuelle. Ortskennung 2 enthält, wird für den sicheren Busteilnehmer b erzeugt. Die sicheren Nachrichten werden in Schritt 5 über den Koppelspeicher 40 dem Interbus-Master 30 in der vorgegebenen Reihenfolge übergeben. Gemäß einer bevorzugten Ausführungsform schreibt der Interbus-Master 30 die sicheren Nachrichten ungelesen in einen Summenrahmen ein, der in
In Schritt 6 überträgt der Interbus-Master 30 den Summenrahmen, der die sicheren Nachrichten und somit die Ortskennungen 1 und 2 enthält, über einen zweiten Kommunikationszyklus 72, der dem Datenzyklus des Interbus-Protokolls entspricht, über den Feldbus 70. Jeder Busteilnehmer liest die für ihn bestimmten Daten in ein Eingangsregister ein. Im vorliegenden Beispiel liest der sichere Busteilnehmer 60 die unmittelbar dem Loopbackwort folgenden Daten, die die Ortskennung 1 enthalten, in das Eingangsregister 84. Die Ortskennung 1 kann dann aus dem Eingangsregister 84 in den Speicher 94 geschrieben werden.In
Nachfolgend wird ein erstes Szenario betrachtet, bei dem das Interbus-Übertragungssystem 10 zum ersten Mal in Betrieb genommen wird. Dies bedeutet, dass in dem Speicher 96 noch keine Referenz-Ortskennung hinterlegt worden ist. Alternativ könnte ein Standardwert im Speicher 96 hinterlegt sein, der dem Mikroprozessor 90 signalisiert, dass das Interbus-Übertragungssystems 10 bisher noch nicht in Betrieb genommen wurde.Hereinafter, a first scenario is considered in which the
Die in den Speichern 88 und 94 hinterlegten individuellen Ortskennungen werden gemäß Schritt 7 dem Vergleicher 92 zugeführt, welcher prüft, ob die Speicherinhalte, d. h. die abgelegten Ortskennungen, übereinstimmen. Stellt der Vergleicher 92 eine Übereinstimmung der beiden in den Speichern 88 und 94 abgelegten Ortskennungen fest, kann die im Speicher 88 oder die im Speicher 94 hinterlegte Ortskennung 1 unmittelbar in den Speicher 96 als Referenz-Ortskennung abgelegt werden.The stored in the
Der Mikroprozessor 90 erzeugt nunmehr eine sichere Nachricht, in welcher zum Beispiel der Gerätetyp, die Herstellerkennung und die Seriennummer des sicheren Busteilnehmers 60 eingeschrieben werden. Zusätzlich enthält die sichere Nachricht einen Hinweis darüber, dass die in den Speichern 88.und 94 abgelegte Ortskennungen übereinstimmen. Diese sichere Nachricht wird in das Ausgangsregister 86 geschrieben. Während eines weiteren Datenzyklus wird der Inhalt des Ausgangsregisters 86 in einen entsprechenden Summenrahmen eingebettet, der dann in Schritt 8 über den Ausgang des Busteilnehmers 60 an den Feldbus 70 angelegt und von dort zum Interbus-Master 30 übertragen wird. Der Interbus-Master 30 entnimmt aus dem empfangenen Summenrahmen alle sicheren Nachrichten und überträgt diese in Schritt 9 über den Koppelspeicher 90 zur sicheren Steuereinrichtung 50. Angemerkt sei, dass bei einer vorteilhaften Ausführungsform der Interbus-Master 30 die sicheren Nachrichten ungelesen an die sichere Steuereinrichtung 50 weiterleitet. Die sichere Steuereinrichtung 50 erfährt anhand der für den Busteilnehmer 60 bestimmten sicheren Nachricht, dass die in den Speicher 88 und 94 hinterlegten Ortskennungen übereinstimmen. Dies bedeutet dass der sichere Busteilnehmer 60 an dem richtigen Einbauort innerhalb des Feldbusses 70 angeschaltet ist, so dass nunmehr die Anmeldung des sicheren Busteilnehmers 60 am Interbus-Übertragungssystem 10 erfolgen kann. Die Anmeldung des sichern Busteilnehmers 60 erfolgt dadurch, dass die in der sicheren Nachricht enthaltene Seriennummer in der sicheren Steuereinrichtung 50 abgelegt wird. Die sichere Steuereinrichtung 50 kann gemäß Schritt 10 auf einem integrieren Display einem Anwender anzeigen, dass der Busteilnehmer 60 am richtigen Einbauort angeschlossen und angemeldet worden ist. Die sichere Steuereinrichtung 50 kann alternativ oder zusätzlich über eine Schnittstelle verfügen, über die diese Hinweise an eine externe Einrichtung übertragen werden können.The
Nunmehr wird ein zweites Szenario betrachtet. Hierbei sei angenommen, dass das Interbus-Übertragungssystem 10 bereits ordnungsgemäß in Betrieb genommen worden ist, so dass im Speicher 96 des Busteilnehmers 60 die Referenz-Ortskennung 1 gespeichert ist. Weiterhin sei angenommen, dass das Interbus-Übertragungssystem 10 nach einem gewünschten oder unerwünschten Stillstand erneut anlaufen soll.Now a second scenario is considered. Here it is assumed that the
Ähnlich den Erläuterungen hinsichtlich des ersten Szenarios werden vor dem Anlauf des Intebus-Übertragungssystems 10 während eines Identifikations-Zyklus vom Interbus-Master 30 die individuellen Ortskennungen der sicheren Busteilnehmer 60 und b in einem als Summenrahmen aufgebauten Telegramm zu den jeweiligen Busteilnehmern übertragen. Der sichere Busteilnehmer 60 liest die für ihn bestimmten Steuerinformationen einschließlich der Ortskennung aus dem Telegramm aus und schreibt die Ortskennung in den Speicher 88. Die sichere Steuereinrichtung 50 erzeugt wiederum sichere Nachrichten, die die jeweiligen Ortskennungen für die sicheren Busteilnehmer 60 und b enthalten und überträgt diese über den Koppelspeicher 40 zum Interbus-Master 30. Der Interbus-Master 30 bettet die sicheren Nachrichten an entsprechende Stellen eines Summenrahmens ein und überträgt die sicheren Nachrichten in einem Datenzyklus zu den jeweiligen sicheren Busteilnehmern. Der sichere Busteilnehmer 60 entnimmt dem ankommenden Summenrahmen die für ihn bestimmte sichere Nachricht und schreibt die darin enthaltene Ortskennung in den Speicher 94.Similar to the explanations regarding the first scenario, before the start of the in-
Im Vergleicher 92 werden nunmehr die Inhalte der beiden Speicher 88 und 94 miteinander verglichen.In the
Bei einem ersten Unterfall sei angenommen, dass der Vergleicher 92 festgestellt hat, dass die Speicherinhalte der Speicher 88 und 94 übereinstimmen. Das bedeutet, dass die in den beiden separaten Kommunikationszyklen übertragenen Ortskennungen identisch sind. Darauf hin vergleicht der Vergleicher 92 die im Speicher 96 hinterlegte Referenz-Ortskennung mit der im Speicher 88 oder im Speicher 94 hinterlegten Ortskennung. Stimmt die individuelle Ortskennung mit der Referenz-Ortskennung überein, ist sichergestellt, dass der sichere Busteilnehmer 60 an dem für ihn vorgesehenen Einbauort innerhalb des Feldbuses 70 angeschlossen ist. Unter Steuerung des Mikroprozessors 90 wird daraufhin eine sichere Nachricht erzeugt, die zumindest eine Information darüber enthält, dass die Referenz-Ortskennung und die in den Speichern 88 und 94 gespeicherten Ortskennungen übereinstimmen. Zusätzlich kann die sichere Nachricht die Herstellerkennung, die Seriennummer und/oder den Gerätetyp des sicheren Busteilnehmers 60 enthalten. Die sichere Nachricht wird im Ausgangsregister 86 zwischengespeichert. Während eines entsprechenden Datenzyklus wird sie in einen Summenrahmen eingebettet und über den Interbus-Master 30 und den Koppelspeicher 40 weiter zur sicheren Steuereinrichtung 50 übertragen. Unter Ansprechen auf die sichere Nachricht signalisiert die sichere Steuereinrichtung 50 dem Anwender, dass der sichere Busteilnehmer 60 sowohl im ersten als auch im zweiten Kommunikationszyklus die gleiche Ortskennung erhalten hat, die ferner mit der gespeicherten Referenz-Ortskennung übereinstimmt. Damit ist sicher gestellt, dass der Busteilnehmer 60 am vorbestimmten Einbauort angeschaltet ist.For a first sub-case, assume that
Sobald feststeht, dass alle sicheren Busteilnehmer an den für sie vorbestimmten Einbauorten angeschaltet sind, kann das Interbus-Übertragungssystem 10 anlaufen und es können Prozessdaten übertragen werden.Once it is determined that all secure bus subscribers are turned on at the pre-determined installation locations, the
Angenommen sei nunmehr ein zweiter Unterfall, bei dem der Vergleicher 92 des sicheren Busteilnehmers 60 festgestellt hat, dass die in den Speichern 88 und 94 hinterlegten Ortskennungen nicht übereinstimmen. In diesem Fall sorgt der Mikroprozessor 90 dafür, dass der sichere Busteilnehmer 60 in einen sicheren Zustand überführt, eine sichere Nachricht, die zumindest den Gerätetyp des sicheren Busteilnehmers 60 enthält, erzeugt und zur sicheren Steuereinrichtung 50 übertragen wird. Unter Ansprechen auf die sichere Nachricht kann die sichere Steuereinrichtung 50 den Anwender darüber informieren, dass ein Fehler aufgetreten ist. Die sichere Steuereinrichtung 50 kann dann automatisch oder durch den Anwender veranlasst das gesamte Interbus-Übertragungssystem 10 abschaltet oder in einen sicheren Zustand zu überführen.Assume now a second sub case in which the
Angenommen sei ein dritter Unterfall, bei dem der Vergleicher 92 festgestellt hat, dass die in den Speichern 88 und 94 hinterlegten Ortskennungen, aber nicht mit der im Speicher 96 hinterlegten Referenz-Ortskennung 1 übereinstimmen. Daraufhin erzeugt der Mikroprozessor 90 eine sichere Nachricht, die vorzugsweise den Gerätetyp, die Herstellerkennung, die Seriennummer des sicheren Busteilnehmers 60 und eine Information enthält, die anzeigt, dass ein Systemfehler vorliegt oder der sichere Busteilnehmer ausgetauscht oder an einem anderen Einbauort angeschaltet worden ist.Assume a third sub case where the
Die sichere Nachricht wird, wie oben beschrieben, während eines Datenzyklus in einem Summenrahmen über den Interbus-Master, den Koppelspeicher 40 zur sicheren Steuereinrichtung 50 übertragen. Unter Ansprechen auf die sichere Nachricht meldet die sichere Steuereinrichtung 50 in Schritt 10 dem Anwender, dass die zum sichern Busteilnehmer 60 übertragenen individuelle Ortskennung nicht mit der im Speicher 96 hinterlegten Referenz-Ortskennung übereinstimmen. Ein Grund hierfür kann darin liegen, dass der Anwender entweder den sicheren Busteilnehmer 60 ausgetauscht oder an einem anderen Ort innerhalb des Feldbuses 70 angeschaltet hat.As described above, the secure message is transmitted to the
Anhand der in der sicheren Nachricht übertragenen Herstellerkennung, dem Geräte-Typ und/oder der Seriennummer des sicheren Busteilnehmers 60 sowie der in der sicheren Steuereinrichtung 50 abgelegten Konfigurationsdatensätzen kann geprüft werden, ob ein Teilnehmertausch stattgefunden hat oder ob aus anderen Gründen eine falsche Ortskennung dem sicheren Busteilnehmer 60 übermittelt worden ist.On the basis of transmitted in the secure message manufacturer ID, the device type and / or the serial number of the
Hat der Anwender tatsächlich den sicheren Busteilnehmer 60 ausgetauscht und stimmt die in der sicheren Nachricht empfangene Herstellerkennung und/oder der Gerätetyp mit dem Konfigurationsdatensatz, der in der sicheren Steuereinrichtung 50 abgelegt ist überein, wird der Anwender aufgefordert, die Ortskennungsänderung gegenüber der sicheren Steuereinrichtung 50 zu bestätigen oder abzulehnen. Wenn der Anwender die Ortskennungsänderung bestätigt hat, wird die Seriennummer des jeweiligen sicheren Busteilnehmers in dem Konfigurationsdatensatz, welcher in der sichern Steuereinrichtung 50 abgelegt ist, überschrieben.If the user has actually replaced the
Die sichere Steuereinrichtung 50 kann gemäß einem Ausführungsbeispiel daraufhin eine sichere Nachricht, welche den Bestätigungshinweis und zum Beispiel die Ortskennung, den Geräte-Typ und/oder die Herstellerkennung des neuen sicheren Busteilnehmers enthält, zum Interbus-Master 30 übertragen, der daraufhin in einem weiteren Datenzyklus die sichere Nachricht in einem Summenrahmen zum neuen sicheren Busteilnehmer überträgt. Unter Ansprechen auf die sichere Nachricht sorgt der Mikroprozessor 90 des neuen sicheren Busteilnehmers dafür, dass die Ortskennung, welche im Speicher 88 oder im Speicher 94 gespeichert ist, als neue Referenz-Ortskennung in den Speicher 96 übernommen wird.The
Alternativ kann die neue Ortskennung auch ohne vorherige Bestätigung des neuen Einbauortes durch den Anwender aus dem Speicher 88 oder aus dem Speicher 94 in den Speicher 96 übernommen werden.Alternatively, the new location identifier can also be taken from the
Wird hingegen die Ortskennungsänderung nicht vom Anwender bestätigt, sorgt die sichere Steuereinrichtung 50 und/oder der sichere Busteilnehmer dafür, dass der sichere Busteilnehmer und/oder die Steuer- und Datenübertragungsanlage in einen sicheren Zustand gefahren werden.If, on the other hand, the location identification change is not confirmed by the user, the
Anzumerken ist, dass ein Teilnehmertausch oder das Anschalten eines sicheren Busteilnehmers an einen anderen Einbauort auch dann erkannt werden kann, wenn zufälliger Weise die zu ihm während eines ersten und zweiten Kommunikationszklus übertragenen Ortskennungen mit der im Speicher 96 abgelegten Referenz-Ortskennung übereinstimmen. In diesem Fall kann die sichere Steuereinrichtung 50 anhand der vom sicheren Busteilnehmer in der sicheren Nachricht übertragenen Seriennummer oder Herstellerkennung durch Vergleich mit den hinterlegten Konfigurationsdatensätzen prüfen, ob ein Teilnehmertausch stattgefunden hat.It should be noted that a subscriber exchange or the switching on of a secure bus subscriber to another installation location can also be detected, even if they happen to be there during a first and a second time Communication cycle transmitted location identifiers with the
Da im Interbus-Master 30 alle Konfigurationsdaten, die sowohl die sicheren als auch die nicht sicheren Busteilnehmer beschreiben, enthalten sind, können Fehler bei einer Änderung der Konfiguration auch während eines Anlaufs des Interbus-Übertragungssystems 10 erkannt werden.Since all configuration data describing both the secure and the non-secure bus users are contained in the
Claims (13)
- Method for checking the installation location of at least one secure subscriber (60) connected to a control and data transmission system (10), wherein an unsecure communications control device (30), to which a secure control device (50) is allocated, is connected to the control and data transmission system, wherein the unsecure communications control device (30) knows the position of each connected subscriber in the control and data transmission system (10), comprising the following method steps:- in the unsecure communications control device (30) a first configuration data record is stored which contains information relating to the position of all of connected subscribers in relation to the control and data transmission system (10) and an individual location identifier for each secure subscriber (60);- in the secure control device (50) a second configuration data record is stored which contains a list of only the connected secure subscribers and an individual location identifier for each secure subscriber;- in a first communications cycle an individual location identifier is transmitted in each case from the unsecure communications control device (30) to each secure subscriber(60);- the individual location identifiers contained in the second configuration data record are transmitted in secure messages from the secure control device (50) to the unsecure communications control device (30),- in a second communications cycle the individual location identifiers contained in the received secure messages are transmitted from the unsecure communications control device (30) to the respective secure subscribers (60);- each secure subscriber compares the individual location identifiers received in the first and second communications cycles;- if a secure subscriber establishes that the individual location identifiers match, a check is carried out as to whether a reference location identifier is stored in the respective secure subscriber;- if a reference location identifier is stored in the respective secure subscriber, the individual location identifier is compared to the reference location identifier;- if the individual location identifier matches the stored reference location identifier of the respective secure subscriber, it is signalled to the secure control device (50) that the respective secure subscriber is connected at the predetermined installation location.
- Method as claimed in claim 1, characterised in that the individual location identifier transmitted in the first and/or second communications cycle is stored as a reference location identifier in the respective secure subscriber, if a reference location identifier has not yet been stored; that the secure control device (50) receives from the respective secure subscriber a secure message which contains information that the location identifiers transmitted in the first and second communications cycles match and that a reference location identifier is not yet stored in the respective secure subscriber; and that - in response to the received secure message, the secure control device (50) informs an operator that the location identifiers transmitted in the first and second communications cycles match and that a reference location identifier is not yet stored in the respective secure subscriber, and requests the operator to confirm that the respective secure subscriber is connected at the predetermined installation location.
- Method as claimed in claim 1, characterised in that if the individual location identifiers received in the first and second communications cycles match, the reference location identifier stored in the respective secure subscriber is compared to the individual location identifier, that if the reference location identifier does not match the individual location identifier, the reference location identifier is overwritten by the individual location identifier, that the respective secure subscriber informs the secure control device (50) by means of a secure message that the individual location identifiers received in the first and second communications cycles do not match the stored reference location identifier, and that in response to the received secure message, the secure control device (50) informs an operator that the location identifiers transmitted in the first and second communications cycles match, and that the location identifiers, however, do not match the reference location identifier in the respective secure subscriber, and requests the operator to confirm that the respective secure subscriber is connected at the predetermined installation location.
- Method as claimed in claim 2 or 3, characterised in that the respective secure subscriber (60) and/or the control and data transmission system (10) are transferred to a secure state if the operator does not confirm that the respective secure subscriber is connected at the predetermined installation location or if the respective secure subscriber establishes that the individual location identifiers received in the first and second communications cycles do not match.
- Method as claimed in any one of claims 1 to 4, characterised in that the reference location identifier in the respective secure subscriber is replaced by the individual location identifier only when the operator has confirmed that the respective secure subscriber is connected at the predetermined installation location.
- Method as claimed in any one of claims 1 to 5, characterised in that the control and data transmission system (10) has a ring-shaped design.
- Method as claimed in any one of claims 1 to 6, characterised in that the control and data transmission system (10) contains a field bus (70) in accordance with the Interbus standard, that the first communications cycle is the ID cycle and the second communications cycle is the data cycle of the Interbus protocol, and the individual location identifiers are transmitted at predetermined positions within a summation frame from the unsecure communications control device (30) to the respective secure subscribers,
- Method as claimed in any one of claims 1 to 7, characterised in that at least one subscriber-specific parameter, in particular the manufacturer identifier and the device type, is included for each secure subscriber in the second configuration data record, and that during the first start-up of the control and data transmission system or exchange of secure subscribers, the secure subscribers transmit at least one subscriber-specific parameter and the serial number in at least one secure message to the secure control device (50), wherein the serial number of the respective secure subscriber is added to the second configuration data record.
- Method as claimed in any one of claims 1 to 8, characterised in that the secure messages which come from the secure control device (50) and which contain the individual location identifiers are relayed in the second communications cycle from the unsecure communications control device (30) to the respective secure subscribers.
- Control and data transmission system, comprising:a transmission device (70), to which at least one unsecure communications control device (30) and at least one secure subscriber (60) are connected, wherein the unsecure communications control device (30) knows the position of each connected subscriber and has a memory device for storing a first configuration data record which contains information relating to the position of all connected subscribers in relation to the control and data transmission system (10), and an individual location identifier for each secure subscriber (60);a secure control device (50) allocated to the unsecure communications control device (30) with a memory device for storing a second configuration data record which contains a list of only the connected secure subscribers and also an individual location identifier for each secure subscriber, whereinthe secure control device (50) is designed for generating and transmitting a secure message, which contains the individual location identifier of a secure subscriber (60), to the unsecure communications control device (30), whereinthe unsecure communications control device (30) is designed for transmitting individual location identifiers to secure subscribers (60) during a first communications cycle and for transmitting the individual location identifiers, which are received from the secure control device (50), to the secure subscribers (60) during a second communications cycle, whereineach secure subscriber comprises a memory device (96) for storing a reference location identifier, a device (92) for comparing the individual location identifiers received during the first and second communications cycles, a device for comparing the received individual location identifiers to a reference location identifier, a device for transmitting at least one secure message to the secure control device, wherein the secure message contains information relating to the comparison results,wherein in response to the secure message received from a secure subscriber, the secure control device (50) requests an operator to confirm that the secure subscriber is connected at the predetermined installation location.
- Control and data transmission system as claimed in claim 10, characterised by a device for transferring a secure subscriber and/or the control and data transmission system to a secure state, if the operator does not confirm that the respective secure subscriber is connected at the predetermined installation location or if the respective secure subscriber establishes that the individual location identifiers transmitted in the first and second communications cycles do not match.
- Control and data transmission system as claimed in claim 10 or 11, characterised in that
the secure control device (50) is connected to the unsecure communications control device (30) via a coupling memory (40). - Control and data transmission system as claimed in any one of claims 10 to 12, characterised by
a programmable control unit (90) which, in response to the fact that the individual location identifiers transmitted in the first and second communications cycles do not [lacuna] the reference location identifier stored in the memory device of a respective secure subscriber, causes the respective secure subscriber to overwrite the reference location identifier with the individual location identifier.
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DE102006013578A DE102006013578B4 (en) | 2006-03-22 | 2006-03-22 | Method and control and data transmission system for checking the installation location of a secure communication subscriber |
PCT/EP2007/002235 WO2007107271A1 (en) | 2006-03-22 | 2007-03-14 | Method and control and data transmission system for verifying the installation location of a secure communications component |
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EP1996983B1 true EP1996983B1 (en) | 2011-06-01 |
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EP (1) | EP1996983B1 (en) |
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CN101405666A (en) | 2009-04-08 |
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JP2009530931A (en) | 2009-08-27 |
WO2007107271A1 (en) | 2007-09-27 |
US8134448B2 (en) | 2012-03-13 |
CN101405666B (en) | 2011-06-01 |
ATE511727T1 (en) | 2011-06-15 |
DE102006013578B4 (en) | 2008-03-27 |
JP4827964B2 (en) | 2011-11-30 |
ES2362539T3 (en) | 2011-07-07 |
DE102006013578A1 (en) | 2007-09-27 |
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